https://www.youtube.com/watch?v=nvwIVPtD5fI
The things I didn't like are:
1. It looks like all Loona MVs put in one
2. The whole "backstory and worldbuilding" thingy is getting old, at least for me. After Loonaverse and Kwangya, I'm not sure there's something new that can take us by surprise
But overall, I personally liked the vibe, it looks high budget and the instrumental sounds promising. I'm definitely tuning in for their debut.